linux-kernel - [PATCH v4 1/5] dt-bindings: reset: Add AOSS reset bindings for SDM845 SoCs

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Date:   Wed, 25 Apr 2018 20:38:39 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     bjorn.andersson@...aro.org, p.zabel@...gutronix.de,
        robh+dt@...nel.org
Cc:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, sibis@...eaurora.org,
        georgi.djakov@...aro.org, jassisinghbrar@...il.com,
        ohad@...ery.com, mark.rutland@....com, kyan@...eaurora.org,
        sricharan@...eaurora.org, akdwived@...eaurora.org,
        linux-arm-msm@...r.kernel.org, tsoni@...eaurora.org
Subject: [PATCH v4 1/5] dt-bindings: reset: Add AOSS reset bindings for SDM845 SoCs

Add SDM845 AOSS (always on subsystem) reset controller binding

Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---
 .../bindings/reset/qcom,aoss-reset.txt        | 52 +++++++++++++++++++
 include/dt-bindings/reset/qcom,sdm845-aoss.h  | 17 ++++++
 2 files changed, 69 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reset/qcom,aoss-reset.txt
 create mode 100644 include/dt-bindings/reset/qcom,sdm845-aoss.h

diff --git a/Documentation/devicetree/bindings/reset/qcom,aoss-reset.txt b/Documentation/devicetree/bindings/reset/qcom,aoss-reset.txt
new file mode 100644
index 000000000000..e5201de9a314
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/qcom,aoss-reset.txt
@@ -0,0 +1,52 @@
+Qualcomm AOSS Reset Controller
+======================================
+
+This binding describes a reset-controller found on AOSS (always on subsystem)
+for Qualcomm SDM845 SoCs.
+
+Required properties:
+- compatible:
+	Usage: required
+	Value type: <string>
+	Definition: must be:
+		    "qcom,sdm845-aoss-reset"
+
+- reg:
+	Usage: required
+	Value type: <prop-encoded-array>
+	Definition: must specify the base address and size of the register
+	            space.
+
+- #reset-cells:
+	Usage: required
+	Value type: <uint>
+	Definition: must be 1; cell entry represents the reset index.
+
+Example:
+
+aoss_reset: qcom,reset-controller@...0100 {
+	compatible = "qcom,sdm845-aoss-reset";
+	reg = <0xc2b0000 0x21000>;
+	#reset-cells = <1>;
+};
+
+Specifying reset lines connected to IP modules
+==============================================
+
+Device nodes that need access to reset lines should
+specify them as a reset phandle in their corresponding node as
+specified in reset.txt.
+
+For list of all valid reset indicies see
+<dt-bindings/reset/qcom,sdm845-aoss.h>
+
+Example:
+
+modem-pil@...0000 {
+	...
+
+	resets = <&aoss_reset AOSS_CC_MSS_RESTART>;
+	reset-names = "mss_restart";
+
+	...
+};
diff --git a/include/dt-bindings/reset/qcom,sdm845-aoss.h b/include/dt-bindings/reset/qcom,sdm845-aoss.h
new file mode 100644
index 000000000000..476c5fc873b6
--- /dev/null
+++ b/include/dt-bindings/reset/qcom,sdm845-aoss.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DT_BINDINGS_RESET_AOSS_SDM_845_H
+#define _DT_BINDINGS_RESET_AOSS_SDM_845_H
+
+#define AOSS_CC_MSS_RESTART	0
+#define AOSS_CC_CAMSS_RESTART	1
+#define AOSS_CC_VENUS_RESTART	2
+#define AOSS_CC_GPU_RESTART	3
+#define AOSS_CC_DISPSS_RESTART	4
+#define AOSS_CC_WCSS_RESTART	5
+#define AOSS_CC_LPASS_RESTART	6
+
+#endif
-- 
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a Linux Foundation Collaborative Project